John Blackbourn (@johnbillion) – WordPress user profile

Bio

I’m one of the team of WordPress core developers. I was the release lead for WordPress 4.1 and 4.9.1. I work as the Director of WordPress Security at Human Made and I’m the WordPress core security team lead.

Previously I’ve worked at Code For The People and WordPress.com VIP.

Badges

CODE

6 badges

Core Contributor '15 Core Team '15 Meta Contributor '15 Plugin Developer Security Contributor '22 Security Team '22

CONTENT

1 badge

Documentation Contributor '17

COMMUNITY

5 badges

bbPress Contributor '19 B BuddyPress Contributor '19 Meetup Organizer '18 WordCamp Organizer '20 WordCamp Speaker '19

PRACTICE

1 badge

Accessibility Contributor '19

POLYGLOTS

1 badge

Translation Contributor '15

Current Job

Present

Human Made Ltd

Recent impact

Score weights high-impact work (commits, releases, approved translations, props) at 3x routine activity.

Last 30 days

18contributions

high15

medium3

score48

Last 90 days

76contributions

high28

medium48

score132

Last 12 months

187contributions

high48

medium139

score283

Specializations

evenly split across 1 team · no team-attributable activity in the last 365 days

Core 100% of attributed activity

Contributions

Type

May 2026

May 28 Thu · 17:27

Meta high

Wrote a new handbook page, Security Team Members, on the site Making WordPress Secure

May 28 Thu · 17:26

Meta high

Made 5 updates to handbook pages on Making WordPress Secure.

May 28 Thu · 17:26

Meta high

Wrote a new handbook page, Security Researchers, on the site Making WordPress Secure

May 28 Thu · 17:26

Meta high

Wrote a new handbook page, Security Contributors, on the site Making WordPress Secure

May 28 Thu · 09:12

Forums med

Posted a reply to WordPress 7.0 Support Status, on the site WordPress.org Forums:
Yes it's tested and working on 7.0. I'm just yet to bump the supported version…

May 27 Wed · 08:43

Meta high

Made 6 updates to handbook pages on Making WordPress Secure.

May 27 Wed · 08:42

Meta high

Wrote a new handbook page, HackerOne inbox access, on the site Making WordPress Secure:
Do you wish to report a security vulnerability in WordPress? All the information on doing…

May 27 Wed · 08:42

Meta high

Wrote a new handbook page, Security Contributor Handbook, on the site Making WordPress Secure:
Welcome to the Security Contributor Handbook. This handbook contains public information about processes and policies…

May 27 Wed · 07:59

Meta high

Made 3 updates to handbook pages on Make WordPress Core.

May 26 Tue · 19:05

Meta high

Made 2 updates to handbook pages on Make WordPress Core.